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采用射频反应溅射法在热解碳材料上制得均匀透明的TiO2纳米薄膜。利用X射线衍射(XRD)分析、扫描电子显微镜(SEM)等表征技术研究了不同溅射功率对TiO2薄膜的结晶特性和表面形貌的影响,以及TiO2薄膜的体外抗血小板黏附和抗全血凝结性能。研究结果显示,射频功率为200 W时,薄膜表面光滑平整、透明、呈淡蓝色,由锐钛矿型TiO2纳米微粒构成,其微粒大小在30 nm左右;同时,此法制备的TiO2纳米薄膜具有较好的抗人体血小板黏附及抗全血凝结性能,均优于传统的热解碳材料。提示,该TiO2纳米薄膜在人工心脏瓣膜以及血管内支架等材料的改良方面具有较好的应用前景。
A uniform and transparent TiO2 nano-film was prepared on the pyrolytic carbon by radio frequency reactive sputtering. The effects of different sputtering powers on the crystallization characteristics and surface morphology of TiO2 thin films were studied by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The anti-platelet adhesion and anti-whole blood coagulation performance. The results show that when the RF power is 200 W, the surface of the film is smooth, transparent and light blue, which is composed of anatase TiO2 nanoparticles with the size of about 30 nm. Meanwhile, the TiO2 nano-film Has better anti-human platelet adhesion and anti-whole blood coagulation performance, are better than the traditional pyrolytic carbon material. It is suggested that the TiO2nanofilm has better application prospects in the improvement of materials such as artificial heart valves and endovascular stents.